An intervention can be risky, that's why it's usually best if a professional is present. If it's just family members, there's a risk of family just bashing the person with negative messages such as "Why can't you just get over this?" or "Everyone can see how this is a problem, why can't you?" or even "Don't you see how this is hurting all of us?"

A professional can guide the session and make sure everyone gets a chance to communicate how they feel without the person feeling like everyone is just turning against them. I highly recommend finding a professional to coach the family on how to best approach your daughter rather than just creating a risky environment.

Really, an intervention done poorly can have many negative results, such as causing a HUGE rift in the family, or even driving some into depression or toward suicidal thoughts.

Please be careful and seek professional guidance.